Mr. Barnett told TheNew York Times that “at least a few buyers were ‘significant Forbes billionaires.'”

The building has already sold a duplex on the 89th and 90th floors for $95 million. This past summer alone, One57 sold $300 million worth of apartments, and has already done $1.5 billion in business since going on the market last November.

The building may bag more international billionaires. Two interested parties from China are “circling” one of One57’s available units.

But not all big-money guys are welcome. Mr. Barnett has turned down Nick Candy, an English developer, and millionaire Michael Hirtenstein. Mr. Candy reportedly was planning to flip his One57 apartment before the building completed construction, while Mr. Hirtenstein hired a construction worker to film a video of his apartment, which later revealed that his apartment’s view would be partially obstructed by The Essex House sign, The New York Times reports.

On the One57 amenities: “This will be the best amenities package in the entire city. All the others are good. But they don’t have everything.”

On the One57 finishes: “Look at this kitchen. Where will you find a kitchen anywhere like this? It’s the best, and we have two of them.”

On the One57 floor plans: “We have the best floor plans on the market.”

On the One 57 views. “That’s a killer view. There’s nothing as good as this. All the other buildings, they say the have a view, but it’s on an angle. This is dead center.” (Having been up on the 68th floor, as of two weeks ago the highest, there is something to this claim—the views are spectacular, and already exceeding the Top of the Rock.)

On One57′s astronomical prices: “Look at this, and it’s six-something a foot. If this was one of the other buildings, it would be closer to 10,000 a foot. And in this building, it’s not even the best views. I think it’s one of the best deals in the building, in the city.”

On One 57’s architect, Pritzker Prize-winner Christian de Portzamparc: “We hire the best people so we can do the best work.”